refine custom logger

[binbin0325]

No description provided.

[codecov-commenter]

Codecov Report

Merging #436 (2a9490c) into master (d73b050) will increase coverage by 0.58%.
The diff coverage is 77.77%.

@@            Coverage Diff             @@
##           master     #436      +/-   ##
==========================================
+ Coverage   52.60%   53.19%   +0.58%     
==========================================
  Files          25       25              
  Lines        2093     2100       +7     
==========================================
+ Hits         1101     1117      +16     
+ Misses        911      899      -12     
- Partials       81       84       +3     

Impacted Files	Coverage Δ
common/constant/client_config_options.go	91.54% <20.00%> (-4.04%)	⬇️
common/logger/logger.go	90.32% <69.23%> (+17.34%)	⬆️
clients/config_client/config_client.go	56.91% <100.00%> (+1.11%)	⬆️
clients/naming_client/naming_client.go	59.27% <100.00%> (+1.75%)	⬆️
clients/naming_client/host_reactor.go	68.29% <0.00%> (-1.63%)	⬇️

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